What Do Blue Light Blocking Glasses Do?

...And Why Should You Wear Them Before Bed?

Our exposure to screens is almost constant—from smartphones and tablets to laptops and TVs. While these devices keep us connected and entertained, they also emit blue light, a high-energy visible (HEV) light that can have a significant impact on our health, particularly our sleep. That’s where blue light blocking glasses come in.

What Is Blue Light?

Blue light is part of the visible light spectrum with a wavelength between 400–490 nanometers. It’s naturally present in sunlight and plays a crucial role in regulating our circadian rhythm—our body’s internal clock that tells us when to be awake and when to sleep.

However problems arise when we're exposed to artificial blue light after sunset. Unlike natural daylight, this kind of blue light can trick the brain into thinking it's still daytime, suppressing melatonin production—the hormone responsible for making you feel sleepy.

How Blue Light Affects Your Sleep

Multiple scientific studies have shown that blue light exposure in the evening delays melatonin secretion, increases alertness, and shifts the circadian rhythm. A landmark study from Harvard Medical School found that exposure to blue light for just 6.5 hours suppressed melatonin production twice as much as green light and shifted circadian rhythms by twice as long.

This disruption doesn’t just make it harder to fall asleep—it also affects sleep quality, duration, and can even lead to long-term issues such as insomnia, fatigue, and impaired cognitive performance.

What Do Blue Light Blocking Glasses Do?

Blue light blocking glasses are designed with special lenses that filter out blue light, particularly in the 400–500nm range. When worn in the evening, these glasses reduce the amount of artificial blue light reaching your eyes, helping your body maintain its natural circadian rhythm and setting you up for a wonderful night's sleep.

High-quality lenses can block up to 90% of blue light in the disruptive range, significantly reducing melatonin suppression. This allows your brain to produce sleep-inducing hormones as it normally would after sunset, leading to better sleep onset and deeper, more restorative rest.

Benefits of Wearing Blue Light Glasses Before Bed

Wearing blue light blocking glasses for 1–2 hours before bed offers several science-backed benefits:

• Improved Sleep Quality: Reduced exposure to blue light helps your body naturally prepare for sleep.

• Enhanced Melatonin Production: Blocking blue light supports the hormonal processes essential for falling and staying asleep.

• Reduced Eye Strain: These glasses also alleviate digital eye strain, reducing headaches and dry eyes often associated with screen use.

• Better Mood and Focus: Quality sleep supports mental clarity, emotional balance, and daytime productivity.

Shop our premium range of blue light blocking glasses today and experience the difference a good night’s sleep can make. Better sleep starts tonight.